{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The limits of detection were found in the range of 1 . 6 - 3 . 9 micro g L ( - 1 ) , while preconcentration factor for all understudy metal ions were found to be 166 with loading half time ( t 1 / 2 ) less than 10 min ."}
{"Chemical": []}